class_docstr: Cross Stage Partial Layer.
  Args:
      in_channels (int): The input channels of the CSP layer.
      out_channels (int): The output channels of the CSP layer.
      expand_ratio (float): Ratio to adjust the number of channels of the
          hidden layer. Default: 0.5
      num_blocks (int): Number of blocks. Default: 1
      add_identity (bool): Whether to add identity in blocks.
          Default: True
      use_depthwise (bool): Whether to depthwise separable convolution in
          blocks. Default: False
code: def forward(self, x):
      x_short = self.short_conv(x)
  
      x_main = self.main_conv(x)
      x_main = self.blocks(x_main)
  
      x_final = paddle.concat((x_main, x_short), axis=1)
      return self.final_conv(x_final)
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddle import ParamAttr
label_desc: Use image node_id 2 for calling the CSPLayer obj's underlying member method code with example usage: obj.forward(x) and returns: self